Rewinding machine



May 29, 1945. R. E. MATTHEWS ET Al.y 2,376,879

REWINDING MACHINE Filed Feb. 17, 1942 2 Sheets-Sheet l May 29, 1945.

R El. 'MATTHEWS ET AL REWINDING MACHINE Filed Feb. 17. 1942 2 Sheefcs-Sheet 2 Patented May 29, 1945 y y2,376,879v

2,376,879. REWINDING MACHINE l Robinson E. Matthews and Floyd F. Hensley,

Brevard, N. C., assignors to Ecusta Paper Corporation, a corporation of Delaware Application February 17, 1942, Serial No. 431,282

Claims.

Our invention relates to machines for winding or rewinding web material and more particularly to improvements in machines especially adapted Afor rewinding high quality Vpaper like cigarette paper, in continuous web form. The invention is described hereafter with particular reference to cigarette paper but only for illustrative purposes since the equipment may be employed or adapted for the winding or rewinding of any desired web material.' Likewise the machine may or may not employ slitting operations, including` the use of knives, for slitting the paper into two or more parts and for cutting off a narrow strip along the edges of the rewound paper to 'obtain a smooth edge.

The machine of our invention is useful for rewinding paper in such a manner that it can be inspected for defects during the rewinding operation. This comprises unwinding of the original roll of paper and rewinding the paper at a distance so that the continuous moving web of paper may be viewed between the unwinding and rewinding rolls. In this type of operation several practicaly problems arise; namely, endwise slipping of the `paper on the unwindinii,r or supply roll; tendency of the narrow trim, cut from the edges of the paper, to fall down on the rewinding mandrel; and difficulty of designating for future reference the exact locations of the defects as they show up in the rapidly moving continuous paper web.`

In accordance with our invention wehave perfected improvements in the rewinding machine to overcome all these problems and to improve otherwise the efficiency of operation of these machines.

y With regard to the' problem of the paper slipping on the supply roll, we have devised two means, either or both of which may be used to prevent this trouble. These means comprise core clamps, which are adapted to clamp around the mandrel of the supply rolladjacent to the roll, and the use of knurled surfaces on the mandrel of the supply roll.

The problem of the narrow cut trim tending to fall away vfrom the rewinding roll has required using a clamp around the rewind mandrel and in close abutting position with the bobbin of the rewound strip. This clamp makes it possibleto maintain a very narrow cut strip, which for example may be no more than about one half inch in Width.

In connection withthe difiiculty of locating' and markingfor future use the defects in the paper, we have provided a measuring rulev or scale graduated into specified units and be^ring easilyl visible numerals that indicate various distances from each edge of the paper to the center of the scale. We position this graduated scale above and crosswise themoving web of paper, so

that, as the paper passes under -this measuring device, the location of rany holes, tears, wrinkles, spots, o r other common defects occurring in the paper can easily be determined by the inspector,

who is constantly watching the moving web of paper. For example, the inspector notes the distance (as indicated by the scale) of a hole in the paper from the nearest edge of the paper. He then records this measurementron a, small tab of paper, commonly referred to asa flag, and places this tab in between the two adjacent-,layers or plies of paper on the rewind roll.v It is held therebetween and projects from the roll a suffi cient distance to be noted when the roll is later handled for further inspection or processing.

Some of the novel features of our invention are set forth with particularity in the appended heretofore the cutting of an appreciably wider strip at the edge of the paper than would normelly be desired, so that the rewind bobbin of this cut strip is self-supportingl and will not slip away from 'the main rewind roll. This procedure however is expensive from the standpoint of waste material produced. In accordance with our invention we have avoided this disadvantage by claims; the details of construction of the equipment and mode of operation will be now more clearly understood from the vfollowing specific but non-limiting description taken in conjunction with the accompanying drawingsin which like reference characters indicate similar parts and in which:

Fig. 1 is a side view ofthe rewinding machine;

Fig. 2 is a plan view of the machine;

Fig. 3 is an end view of the'rewinding mandrel and roll showing a, clamp for supporting vthe narrow trim bobbin;

Fig. 4 is a side view ofthe bobbin and clamp shown in Fig. 3 and the associated mandrel;

Fig. 5 is an elevational view of a mandrel for the supply roll, having knurled sections for preventing paper slippage, and;

Fig. 6gis an elevational view of a smooth surface mandrel for the supply roll, having a clamp provided to prevent paper slippage.

Referring now more specically to the lparts of the rewinding machine as illustrated in the supporting base III, a supply roll II, a rewind roll I2 resting upon a driving roll I3, guide rolls I'4, I5 and I6. A clamp for supporting the trim portion of the rewinding roll I2 is shown at I1.

This type of clamp may be used on the mandrel of the rewind roll as illustrated in Figs. 1, 3 and 4 for supporting the trim bobbin and it may also be used on the smooth supply roll VII as illustrated in Fig. 6 for preventing endwise movement of the paper reel thereon. In lieu of the clamp I1 on the supply roll II the latter vmay be provided with knurled surfaces asindicatedl at I8 in Fig. 5. Either or both of the means I1 and I8 may be used as desired for preventing slipping. of the paper reel on the supply roll. In most instances it is not necessary to use both of these meansI since either one of them will function to prevent lateral movement of the paper.

The clamp I1 may be used at each end of the supply roll if desired although in the usual case l only one clamp is necessary since the paper roll tends to slip in only one direction. The measuring device for locating -defects in the paper web I9 is shown at 20. This device has 4a scale 2l for indicating distances from each edge of the paper I9 to the center line shown at 22. This measuring device is mounted just above the moving paper web I9 and is supported by a bracket 23 which has a clamplike extension'24for encircling the measuring device 20. The clamplike extensions 24 of the supporting brackets 23, as shown more clearly in Fig. 1, are rebent in triangular form to correspond to the cross-sectional form of the scale bar 20. They obviously have certain inherent open slightly to receive said bar 20 and react to clamp it suciently to hold it in place, yet permitting longitudinal adjustment of the bar therein so as to bring the center line of the scale 2I in vertical coincidence with the middle of thepaper web I9 traveling thereunder after the supply roll II and rewind I2 have been adljusted and alined for the proper travel ofthe paper web as hereinbefore described. This measuring device may be made of wood, metal or any other 'suitable material on which a plainly' visible scale can be printed or cut, and is prefervably triangularly shaped so as to present a ing plates such as the ystrap hinge sections 21.

The two collars 25 are connected by means of a toggle clamp. This clamp enables connecting, tightening and locking the two adjacent ends of the two'semi-circular collars. "I'he clamp com-- prises a' bolt 29 which' isl pivotally connected at 29A toone of the strap hinge sections 21 and carries at the other end a stirrup 28 and laterally extending pins 28A which are engaged by the. -reversely curved or clawshaped member 30 `for locking the stirrup to the adjacent end of Athe other collar.

In the illustrations of Figs. 3 and 4- the clamp I1 is positioned around a fiber core 3I on which t thejpaper reel I2 is wound. One of these cores is provided at each end of the paper reel vI2 and 'Y extendsy therethrough to about halfway the lengthgofthe reel where the two cores abut each other. To hold these cores in firm abutting p0- sition we provide at the end of each core a washer 32 held by afnut 33 which is threaded on the shaft 34. The washer 32 is preferably made with a slot 35 so that it may bev inserted on the shaft 34 without removing completely the lock nut 33.

The trim, above referred to, which may be formed at each edge of the rewind roll I2 is shown at 36 in Figs. 2 and 4. When the supporting clamp I1 is used in accordance with our invention, as indicated in Figs. 2 and 4, this trim lsection 36 may be reduced to about 1/2" in width or possibly liess. The trim is cut .by ymeans of 'a disk knife 31 mounted on rotating shaft 3IA. 'Ihis knife functions to slit the paper web as it is wound onto roll I2. Additional similar knives 31B may also be provided 'for slitting the main paper'roll into two or more smaller rolls, when desired.

To control the feed of the paper web from the supply roll II, we' have provided a drum brake shown generally at 38. This brake comprises a brake drum 39 around which is encircled a brake band 49. APivotally connected to this band is an arm 4I and an adjustable weight 42. By longitudinal movement of the weight 42 resiliency and are preformed so as to be sprung the inspector are xed in location on the sheetl 'roll II.

the braking action on the shaft 43, which is connected to the drum 39, may be varied and thereby change the tensionon the paper between supply roll II and windup-roll I2.

The alternate means for preventing slipping of the paper reel as indicated in Fig. 5, namely the knurled sections I8, comprises generally roughened portions on the otherwise smooth The size and extent of these sections may be varied to suit varying conditions. Only one section may be used instead `of two or more sections and it is usually desirable to leave smooth the end portions of ther roll so that if they are handled by the ,operator of the machinetthey will not injure his hands.

During operation of thema'chine, the paper is lunwound from the supply roll II and is advanced by means vof the driving roll I3 which receives power from a motor, not shown. Since the Wind-up roll I2 rests on the driving roll I3 it isrotated thereby and causes the paper web to wind on this roll. The web, in moving from the supply roll II to the wind-up roll I2, is guided by means of stationary rolls I4 and I6 and is also guided and moved by rotating roll I5. `The paper advances, in the direction indicated bythe arrows, around the several rolls. For purposes of inspection it is desirable to provide lights, such as nuorescent tubes indicated at 44, for illuminating the paper and thereby show up defects in the sheet. As indicated by dotted lines in Fig. 2', said fluorescent tubes 44 are 1ocated beneath the paper web I9l which is lightpenetrable. Thus, with the light coming through the paper from below, defects in the paper are easily discernible. These defects when noted by by noting the corresponding location on the scale 2| and thennmarking -this distance on identifying paperv tabs as already described slitting machine for slitting the supply roll of web material into a number of bobbins o! nar- .row width Various other modifications and changes are contemplated within the scope of this invention as suggested by the appended claims.

We claim:

1. In a rewinding machine for continuous web material comprising a supply roll and rewind roll, the combination therewith of a measuring scale positioned above the moving web material and relatively close thereto,v said scale having similar graduations extending from a center point to each end of theA scale .and having two substantially flat surfaces angularly positioned with said graduations thereon. Y

2. Apparatus for rewnding continuous web lmaterial and inspection of the material in the process, comprising in combination; a supply roll of the material and a take-up roll therefor, the supply roll held from movement longitudinally of its axis and the take-up roll having a core on which the web material is wound. a, supporting shaft on which said core is adjusted and held from movement longitudinally of itsaxis, an adj-ustable device ori-said core for determining the end location of the take-up roll and holding said roll cooperatively aligned in web receiving relation to the supply roll, said device abutting and supporting a considerable end area of the body of material woundon the core o! the takeup roll, and a transverse measuring scale posi tioned above and in relatively close proximity to the moving web material between said supply and take-mpv rolls for determining-the location of de? fects in the material with respect to the distance thereof from the edge or edges ot the web.

3. Anapparatus assetiorthinciaimZ and'in 1^ edge of the web of in the moving web and the material 4and ing its lengthwise working position relative t0 the web material traveling thereunder and the takeup roll aligning and holding device on the core is a toggle type clamp.

4. Apparatus for rewinding continuous web mal terial andinspection of the material in the process,` comprising in combination, a supply roll of a. take-up roll therefor. the supply roll held from movement longitudinally of its axis and the take-upl roll having a core on which the web material is wound, a supporting shaft on which said core is adjusted and held from movement longitudinally of its axis, an adinstable device on said end location of the take-up roll and holding said roll cooperatively aligned in web receiving relation to the supply roll, said device abutting and supporting a considerable end area of the body of material 'wound on the core of the take-up roll.

5. In a machine having a web supply and take up roll for the inspection of a continuous moving web .which may have occasional defects therein,

the combination of a scale rule of a length at v least as great as the width o! said web and being positioned substantially parallel to and crosswise of the web and in relatively close proximity thereto, said rule having two substantially ilat surfaces angularly positioned to each other and bearing a scale with similar graduations and positioned so as to be discernible to an inspector of the moving web and tovindicate to him the distance from the any visual defect occurring 35 said graduations as 'it passes thereby.

which the measuring scale is adjustable for varynoBrNsoN E. MA'rrHnw-s.

FLOYD F. HENBLEY.

coinciding with one of core for determining the t .I 

